3-BIT REGISTERED BUS TRANSCEIVER FEATURES DESCRIPTION 25Ω cutoff bus output Extended 100E VEE range of –4.2V to –5.5V 50Ω receiver output Transmit and receive registers 1500ps max. clock to bus 1000ps max. clock to Q Internal edge slow-down capacitors on bus outputs Additional package ground pins Fully compatible with industry standard 10KH, 100K ECL levels ■ Internal 75KΩ input pulldown resistors ■ Fully compatible with Motorola MC10E/100E336 ■ Available in 28-pin PLCC package ■ ■ ■ ■ ■ ■ ■ ■ ■ The SY10/100E336 offer three bus transceivers with both transmit and receive registers and are designed for use in new, high-performance ECL systems. The bus outputs (BUS0 - BUS2) are designed to drive a 25Ω bus. The receive outputs (Q0 – Q2) are specified for 50Ω. The bus outputs feature a normal logic HIGH level (VOH) and a cutoff LOW level when at a logic LOW. At cutoff, the outputs go to –2.0V and the output emitter-follower is “off”, presenting a high impedance to the bus. The bus outputs have edge slow-down capacitors. The Transmit Enable pins (TEN) determine whether current data is held in the transmit register or new data is loaded from the A/B inputs. A logic LOW on both of the bus enable inputs (BUSEN), when clocked through the register, disables the bus outputs to –2.0V. The receiver section clocks bus data into the receive registers after gating with the Receive Enable (RXEN) input. All registers are clocked by rising edge of CLK1 or CLK2 (or both). Additional grounding is provided through the ground pins (GND) which should be connected to 0V. The GND pins are not electrically connected to the chip. Pin Q2 VCCO PIN NAMES B2 A2 NC TEN1 TEN2 PIN CONFIGURATION 26 18 27 17 28 16 TOP VIEW PLCC J28-1 Data Inputs A B0–B2 Data Inputs B GND BUS2 VCC TEN1, 2 Transmit Enable Inputs RXEN Receive Enable Input BUSEN1, 2 Bus Enable Inputs CLK1, 2 Clock Inputs BUS0–BUS2 25Ω Cutoff Bus Outputs Q0–Q2 Receive Data Outputs VCCO VCC to Output 3 13 Q1 VCCO BUS1 4 12 GND 6 7 A1 B1 B0 5 8 9 15 14 10 11 BUS0 GND Q0 2 VCCO 1 Function A0–A2 25 24 23 22 21 20 19 BUSEN1 BUSEN2 RXEN VEE CLK1 CLK2 A0 SY10E336 SY100E336 Rev.: C 1 Amendment: /2 Issue Date: February, 1998 SY10E336 SY100E336 Micrel BLOCK DIAGRAM 0 A0 B0 D Q 25 1 CUTOFF BUS0 D 0 A1 B1 D Q 25 1 A2 B2 Q0 BUS1 D Q 25 1 Q 50 Q1 CUTOFF BUS2 D TEN1 TEN2 RXEN BUSEN1 BUSEN2 50 CUTOFF D 0 Q D Q CLK1 CLK2 2 Q 50 Q2 SY10E336 SY100E336 Micrel DC ELECTRICAL CHARACTERISTICS VEE = VEE (Min.) to VEE (Max.); VCC = VCCO = GND TA = 0°C Symbol Parameter TA = +25°C Min. Typ. Max. Min. Typ. VCUT Cut-off Output Voltage IIH Input HIGH Current RXEN All Other Inputs –2.03 –2.10 — TA = +85°C Max. Min. Typ. –2.03 –2.10 Max. Unit Condition — –2.03 V 1 µA — mA — Unit Condition ps — ps — ps — ps — ps — –2.10 — — — — — 225 150 — — — — 225 150 — — — — 225 150 — — 125 125 150 150 — — 125 125 150 150 — — 125 144 150 173 Power Supply Current IEE 10E 100E NOTE: 1. Measured with VTT = –2.10V. AC ELECTRICAL CHARACTERISTICS VEE = VEE (Min.) to VEE (Max.); VCC = VCCO = GND TA = 0°C Symbol Parameter TA = +25°C TA = +85°C Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. tPLH tPHL Propagation Delay to Output CLK to Q CLK to BUS 500 825 700 1000 1250 1800 500 825 700 1250 1000 1800 500 825 700 1250 1000 1800 tS Set-up Time BUS, RXEN BUSEN A, B Data TEN 150 100 300 450 –150 –200 –50 150 — — — — 150 100 300 450 –150 –200 –50 150 — — — — 150 100 300 450 –150 –200 –50 150 — — — — Hold Time BUS, RXEN BUSEN A, B Data TEN 450 500 350 200 150 200 50 –150 — — — — 450 500 350 200 150 200 50 –150 — — — — 450 500 350 200 150 200 50 –150 — — — — tPW Minimum Pulse Width, CLK 400 — — 400 — — 400 — — tr tf Rise/Fall Time 20% to 80% (Qn) 20% to 80% (BUSn Rise) 20% to 80% (BUSn Fall) 300 500 300 450 800 500 700 1000 800 300 500 300 450 800 500 700 1000 800 300 500 300 450 800 500 700 1000 800 tH PRODUCT ORDERING CODE Ordering Code Package Type Operating Range SY10E336JC J28-1 Commercial SY10E336JCTR J28-1 Commercial SY100E336JC J28-1 Commercial SY100E336JCTR J28-1 Commercial 3 SY10E336 SY100E336 Micrel 28 LEAD PLCC (J28-1) Rev. 03 MICREL-SYNERGY TEL 3250 SCOTT BOULEVARD SANTA CLARA CA 95054 USA + 1 (408) 980-9191 FAX + 1 (408) 914-7878 WEB http://www.micrel.com This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. © 2000 Micrel Incorporated 4